Fix tabIndex not getting reset in IE11

Follow up to #3060

src/diff/props.js

@@ -111,14 +111,17 @@ export function setProperty(dom, name, value, oldValue, isSvg) {
 			name !== 'href' &&
 			name !== 'list' &&
 			name !== 'form' &&
-			// Default value in browsers is `-1` and an empty string is
-			// cast to `0` instead
-			name !== 'tabIndex' &&
 			name !== 'download' &&
 			name in dom
 		) {
 			try {
-				dom[name] = value == null ? '' : value;
+				dom[name] =
+					value == null
+						? // In IE11 the default value for `tabIndex` is `0` instead
+						  // of `-1` like in all other browsers.
+						  // prettier-ignore
+						  name == 'tabIndex' ? -1 : ''
+						: value;
 				// labelled break is 1b smaller here than a return statement (sorry)
 				break o;
 			} catch (e) {}